Pressureless sintering method for synthesizing high-purity Ti3SiC2 powder

Abstract

The invention discloses a pressureless sintering method for synthesizing high-purity Ti3SiC2 powder, comprising the following steps of: (1) adding element powders of Ti, Si, C and Al into a container, adding alcohol and heating and stirring the solution for more than 1h at a controlled temperature of 70 DEG C until the alcohol is totally evaporated so that residual powder is obtained, wherein the molar ratio of Ti, Si, C and Al is 3:1:2:0.1; (2) transferring the residual powder to a tubular furnace, sintering the residual powder at 1420 DEG C for 2 to 2.5h in an atmosphere of argon, and cooling the obtained product naturally so that Ti3SiC2 powder is obtained. Element substances of Ti, Si, C and Al are used as raw materials in the invention, and a synthesis of high-purity (96.7 %) Ti3SiC2 powder is achieved by means of optimized mixing and by using a pressureless sintering method at 1420 DEG C under the protection of argon. The method of the invention provides a good practicability, good economic prospects and good social benefits.

Description

technical field [0001] The invention relates to a novel ceramic material, in particular to a pressureless sintering synthesis of high-purity Ti 3 SiC 2 powder method. Background technique [0002] Ti 3 SiC 2 As a new type of ceramic material, which combines many excellent properties of metal and ceramics, it has recently received more and more attention. Ti 3 SiC 2 Belonging to ternary layered compounds, the general formula of this type of compound is M N + 1 AX N (where N=1, 2, 3; M is a transition metal element, A is a IIIA or IVA group element, and X is carbon or nitrogen). They not only have good thermal conductivity, electrical conductivity, relatively soft, good plasticity and superior processability similar to metals, but also have physical and chemical properties similar to ceramic materials, such as high melting point, oxidation resistance, chemical corrosion resistance, and high temperature resistance. and excellent thermal shock resistance. [0003] Ti ...

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Problems solved by technology

However, most of their synthesis processes involve ball milling and mixing, which have disadvantages such as low production efficiency,

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